Cranking device for internal-combustion engines.



C. R. HALL. GRANKING DEVICE FOR INTERNAL GOMBUSTION ENGINES.

AIPPLIOATION FILED SEPT. 22, 1909.

. l Patented Nov. 1,1910.

2 SHEETS-SHEET 1.

Patented Nov 1,1910

` 2 SHEETS-SHEET 2.

UNITED .sirArns PATENT-caricia,

CHARLES n. HALL,

or MoNnon'roN, PENNSYLVANIA, AssIGNon or 4oNi'LFoUarH ro ROBERT F. HALL, 0F MONROETQN, PENNSYLVANIA.

cnANKrNG DEvIcE ron To all 'it mcy-concernilSe it known .that I, CHARLES Hi/lm., citizen of lthe United States, residing at Monroeton, in the county of ABradford and State of Pennsylvania, have invented certain new and useful Improvementsl in Cranking Devices for InternalfCombustion Engines, of which th e following .is

a` speci- This invention relates broadly to internal f combustion engines and refers particularly to an attachment to' be applied to the same cranked `or` started, and through vthe of which the back for the purpose of preventing the' impulse ofthe back ring of the engine to the'crank handle when 'starting the same.

An ob]ect of this invention .is

to provide an attachment to a gasf which the gas engine may be manually medium disconnect the crank arm from the crank 4shaft of the engine, thereby insuring the safety ofthe operatorin starting the engine. The 4invention further contemplates the provision ofan attachment ofthis character which is .of Isimple formI and'w-hich-.com-

rises but few parts, so' that the same may e readily applied lto gas. engines of common construction wlthoutthe necessity of forming'the crank shaftl or other parts of the engrme for adaptation lto the attachment.

he invention has for a still further object the provision" of a vcranking attachment engine back clutch, which which is so formed that operate when turning the engine 'inthe d1- rection to start thesame, while should the lire, the reverse rotation of the crank shaft will cause the'engagement of a is connected to the 'improved attachment, and will permit of the gradual stopping of the engine and at the same time the same will-freely `bind the crank handle from a reverse movement,thus 4preventing the jerking of the crank handle-from the operators hand or cuire from injuring the operator in' any manner.

For a full understanding ofthe inven-` tion and the merits thereof and also to aca knowledge. of the details of construction, reference is to be vhad to the following descri. tion and accompanying draw-v ings, in whic Figure 1 1s a side elevation `of a gas engine disclosing the improved cranking mechanlsmv as applied to theisame, .the ligure be-- Specification of Letters Patent. Application leii September 22, 1,909. .Serial No. 519,052.-

.engine by means' of'. -'Which extends forwardly from the same firing jof the engine will INTERNAL-GOMBUSTI'ON ENGINES.

Patented Nov. i, 1910.

mg dsclosed'partly in section; Fig. 2 is a longitudinal section through the improved cranking mechanism `detached from the engine; Fig. 3 is a transverse section.fthrough the cranking attachment on the'line 3-3 of Fig. 2; and, Fig'. 4'is a detailed and enlarged sectional' view through the clutch drum disclosing the disks of the clutch as separated from the same.' f

Corresponding and like parts are referred toin the following description. and 'indicated in all the views of the drawings by the same reference characters. Referring particularly to the drawings,

ythe numeral 10 designates an internal comcrank shaft 11 and upon which is secured a ratchet sleeve 12. Theteeth of the ratchet sleeveV 12 are exbustion engine having a tended outwardly in the'direction' of the crank shaft 11 and coperat'e with a second ratchet sleeve 13 mounted upon' a stub shaft 14 connected to the Aimproved cranking mechanism. The stub shaft 14 is extended intoia drum 15a-nd is provided with spaced disks 16, the/same comprising circularly formed and iattened metallic members havingl keyways- '17 cut in the inner edges of the same for Athe reception of keys -18,which are splined to the stub shaft 14. Inthis manner the .disks 16 are'retained in rigid relation upon the stub shaft 14 and-are caused to rotate therewith. The drum 15 ,is provided with disks 19 and 20, the disk end of the drum 15, and through the me-l dium of which threads, the disk 19 is re- .tained within the drum 15 and'against the outer disk 16. Depressione '23 are formed lin the outer face of thedisk 19 4for the reception of a spanner wrench, or a like implement` employed for removing and positioning the disk 19 within the drum 15. The

drum l is converged `at its inner end lto form a neck`24 which 'is suitably ape-rtured for the reception o f a fpin 25 which is eX- tended diametrieally through the` neck 24 end of the stub shaft.14.

The operating shaft 26 is 'extended through a, late 27 which is clamped -to a frame 28 w ich supports the internal combustion engine 10, and the plate 27 `forms a bearing for supporting thev outer end of the shaft 26." Forwardly extended 'from the plate 27, and preferably integrally formed therewith, as is disclosed in the drawings, is a cylinder 29, the same being engaged about the neck`24 to permit of the free rotation of the neck 24 therein. A collar 30 is carried loosely upon the operating shaft 26 adjacent the neck 2.4, andis provided at diametrically opposite points with keys or beads 31 for engagement in grooves 32 formed longitudinally in the forward endof the cylinder 29 4to permit of the longitudinal sliding of the collar 30 and tovlock` the same fr om rotative movement relative to the cylinder 29. y i, f

The collar 30 is provided with a' plurality of ratchet'teeth in itsfforward face which eo-act with a like, plurality of ratchet teeth which are formed upon the-rear end of the neck 24 for the purpose of locking the neck 24 upon thel backward rotation of the same by engagement with the collar 30. The operating shaft 26 carries an abutment 33 which is in the form of a disk and which is keyed to the shaft 26 through the medium of a pin 34 which is extended diametrically`I through the abutment 33 and the shaft 26.- A helical spring 35 is disposed about the shaft 26 between the collar 30 and the abut.- I ment 33 for the purposeof frictiona'lly, holding the collar 30 .against theinner end of the neck 24 to insure the engagement ofthe teeth of the two members upon the reverse motion of the neck 24. In the usual manner a spring 36 is employed which is positioned between the frame 23a-nd the head 37 of a crank arm 38, the head 37 i being Secured to the outer extremity of the 'operating shaft 26. The'spring- 36 is-'provided for the-purpose of. normally retracting the cranking device to 'holdtheratehet sleeves 12 and out of engagement with one another. In the'operation ofthe improved devlce when it is desired to start the gas engine the .crank arm 38 is grasped inthe hand and rotatedin the direction in which the engine is to be run, which is generally in a rotation to the right. When the arm 38 is rotated' the shaft 26 iscarried therewith, which imparts a rotation to the drum 15'. As the drum 15 is rotated the disks 19 and 2O are carried therewith [and by their frict'ional engagecaused `to carry the ,ratchet sleeve 13 therewith. During' the rotation of the crank arm 38 the same is forcedinwardly to earrythe .operating shaft 26 longitudinally through the plate 27, whereby the.ratehet sleeve113 isaabutted with the ratchetsleeve 12k-,and is therebyconneeted to the crank shaft 11 of' the engine. Should the engine tend to back iire or a premature explosion occur, and the crank shaft be given an -impulse in the re` Versedirection, the ratchet lsleeves l2 and 13 will be 'carried withthe crank shaft l11 and rotate the disks 16 together with the stub shaft-14, whereby the drum 15 is given a slight reverse movement. Simultaneously with this operation the teeth-upon the neck 24 lock with the teeth formed upbn the collar 30'and tend to rotate the collar 30. The

collar 3() however, is locked from rotation by the provision of the keys 31 which are engaged` in the grooves 32, whereby the neck 24 is prevented from further rotation and the druinl is held rigidlytogether with the disks19 and 20. Should the force of the explosion be of suflieient strengthA the" disks 16which are carried'by the stub shaft 14, will slide between the disks19 ,a-n'd 2O andwill by their friction bring/ the crank -shaft 11 to a standstill upon the expenditure of the impulse which is imparted to the same by the premature explosion.4 'As ythe operating shaft 26. is carried by the neck 24, which is locked .from backward rota-4 tion', the shaft 26 is/held in an inactiveposiioo tion and consequently the handle 38 is prethe neck 24 when the operating shaftf26 is. I

forced forwardly toward the engine against the tension of the return spring 36.

Having thus described the 'invention what" is claimed as-new is 1..' In a vcranking mechanism the combination with an internal combustion engine having a crank shaft and a ratchet sleeve mounted thereon, of a stud shaft disposed adjacent said crank shaft, a second ratchet sleevecarriedby said stub shaft for interlocking engagement with said first ratchet sleeve, a plurality' of disks disposed in spaced relation upon said stub shaft. :i drum concentrically vdisposed about said stub shaft, a plurality of disks disposed in spaced relation in said drumfor alternate engagef rigidly carried by said operatingl shaft and p u'ralitiesfof within Said ment 'between an` operating said collar,y and means retaining said collar against said druni'.-

3. A cranking mechanism,"- including ak lookin said disks on said stub shaft,

shaft rigidly carried-by' said drum, a cylinder disposed about said operating shaft, a collar slidably disposed within said cylinder, keys carried by said collar for retaining the same from rotation, teeth disposed upon said collar, teeth mounted on said drum for engagement-with the teeth on disposed in said cyl inder' :for .'yieldably holding lsaid collar against saiddrum.

; 2. The combination with an'internal coma crank-shaft, ofaj oustion :engine having stubshaft" disposed inlongitudinal aline menti` adjacent 'said crank shaft, ratchet 'sleeves carried bysaid 'crank shaft-and said stub shaft for interlocking engagement, a

vplurality ofdisks'carried' by said'stub shaft,-

an operating shaft arranged inf longitudinal l alineni'ent adjacentsaid stub shaft, a drum located about' said'stub shaft,

l,alternate arran ement drum a d carried by sai drum and saidv stub shaft, a neck drum, a cylinder loosely "disposed about said disks f disposed neck,.a'collar slidably mounted in said cylinder 'about' said operating shaft, series. of teeth mounted in the adjacent faces of said neck and said collar, an abutment formed on said operating shaft, and a 'spring located between said abutment and said collar for crank-shaft, astub shaft disposed in vinter- Arelation with said crank sha-ft, -disks carrie by said stub shaft, r an operating shaft disposed adjacent said stub shaft, disks carried by said operating shaft for` frictional alternate engagementfbetween said disks on said stubshaft', and' means carried by said 'operating shaft for locking the 'same' upon the reverse rotation thereof.

4. Al cranking mechanism including a formed on said teeth carried by said collar and said drum forL interlocking engagement, and a crank arm'- mounted `upon the inner end of said operating shaft for imparting rotation'lto the same.

y5. In a cranking mechanism, the combination with an internal combustion engine hav-v erating shaftand said. by "said" collar for enl .a springcarried by or engagement with ing-a crank-shaft, of a stub-shaft arranged in alinement with said crank-shaft, intermeshing ratchet sleeves on said shafts, a 4drum concentrically disposed about said stub shaft, disks mounted yabout said stub shaft in said drum and being alternately keyed operatin to said. stub shaft andto said drum, an opv erating shaft rigidi a cylinder engage about said operating shaft, a .collar loosely disposed about said interlocking teeth formed upon said drum and said collar, and a spring 'carried in said cylinder and against said collar to press-said collar against said drum. 4

In testimony whereof I ajix my signature in'y presence of two witnesses. y

CHARLES a. HALL. '[p.' s.; .i Vitnesses: I

B. L.. CAMPBELL,

ALBERT J. MiNGos.

`carried by said drum,-

shaft and keyed to said cylinder,` 

